<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <!-- 引入vue -->
  <script type="text/javascript" src="../js/vue.js"></script>
</head>

<body>
  <div id="root">
    <h2>今天天气{{info}}</h2>
    <!--绑定事件时： @xxx="yyy" yyy可以写一些简单的语句 -->
    <!-- <button @click="isHot=!isHot">切换天气</button> -->
    <button @click="changeWea">切换天气</button>
  </div>
  <script type="text/javascript">
    Vue.config.productionTip = false //阻止 vue 在启动时生成生产提示。、
    new Vue({
      el: '#root',
      data: {
        isHot: true
      },
      computed: {
        info() {
          return this.isHot ? '炎热' : '凉爽'
        }
      },
      methods: {
        changeWea() {
          this.isHot = !this.isHot
        }
      },
    })
  </script>
</body>

</html>